Our Hitchcock movie of the day is the original slasher film, which you should always pop in, especially at Halloween. Played by the inimitable Anthony Perkins, Norman Bates is the creepy, mother-obsessed hotel owner who riles up Janet Leigh and then offs her in the shower. What can I say, it's a classic, it's endlessly watchable and I wish I could say flawless in execution (if not for that silly final psychiatric "explanation" scene- damn, so close to being a perfect film). But the rest of it is all so impeccable that it doesn't take away from the ultimate experience. See Psycho again to watch the birth of the slasher genre, and notice how by killing off the protagonists one by one, Hitchcock manipulates you into having no choice but to start identifying with Norman as the "hero" in his twisted little tale. The audacious storytelling is still stunning for its time.
Original Trailer from 1960 (as you can see, the marketing for this one was a little different, but Hitchcock was such a brand name that he could do whatever weird new thing he wanted at that time) :